The Migros has two sorts of ear plugs. Normal and Forte. Get some of those, you won’t hear the second coming with those in.

Have frequent problems with groups hanging around on play area opposite our flat..chatting loudly at all hours 2am+
Discovered a trick which seems to work well.

I just flick my phone light on and off to mimic a photo flash. A couple of those and they go silent and move on 👍